From their site: We set out to create an up-to-date database for the 110th Congress that provides basic clerical information about members of congress (phone, email, district etc.) via API. Moreover...

From their site: A tool for the public and journalists to find out about US government spending. The data is largely from two sources: the Federal Procurement Data System, which contains information...

ABN (Australian Business Number) Lookup. An XML interface to the ABN Lookup is available to registered users. Using this facility, you can integrate ABN lookups into your own applications. ABN Lookup...

The OpenSecrets API provides access to the data displayed on OpenSecrets.org. OpenSecrets performs research to track money in U.S. politics and its effect on elections and public policy. Use the API...

Use the World Bank API to access the most popular World Bank databases, including the Little Data Book, the Worldwide Governance Indicators, Doing Business data, and the World Bank Photo Library. The...

Use the BART API to get real-time estimated arrival times for every station from the transit agency that serves metropolitan San Francisco, California, USA. When you use this API, you get an XML feed...

The FRED API is a web service that allows developers to write programs and build applications that retrieve economic data from the FRED and ALFRED websites hosted by the Economic Research Division of...

OpenAustralia.org aims to make it easy for people to keep tabs on their representatives in Parliament. OpenAustralia maintains a database of information about representatives, senators, debates, and...

Your Mapper aggregates local government data from cities across the nation, standardizes it, geocodes it, and keeps it up to data for you to use in your apps and services. The Your Mapper API allows...

OpenCongress brings together official government data with news and blog coverage to give users the real story behind each bill. The OpenCongress API also developers to access all this data for their...

LittleSis is a free database tracking the key relationships of politicians, business leaders, lobbyists, financiers, and their affiliated institutions. The LittleSis API exposes the raw data used on...

Openly Local is a project to develop an open and unified way of accessing Local Government information in the UK. Openly Local uses a REST based API that allows users to access information such as a...

The Guardian Politics API covers information about politicians and elections in the UK, with many details going back to 1992. It also contains limited older data, as far back as 1945. Get information...

Retrieve political districts and neighborhoods based on a pair of coordinates. Retrieve city council, community district, state assembly, state senate and U.S. house for any given point. Also returns...

This Social Security Number validation web service identifies any irregularities that may exist in association with the SSN provided and returns results that allow users to take appropriate action as...

Where Does My Money Go is a UK-based open government site from the Open Knowledge Foundation. It aims to make government finances much easier to explore and understand. The Where Does My Money Go API...

Sunlight Labs provides a RESTful API for viewing near real-time data from the current congress and archived data from the previous congress (data stored in MongoDB, for archived congress information...

Vote.ca is a website that matches Canadian addresses or geographical points to their corresponding Canadian political districts. Vote.ca also provides a free API for developers to use.
The Districts...

The city of Badalona, Spain makes much of its existing data in the computer systems available to its citizens through the Open Data initiative. The data available is seperated into four main formats...

Granicus supplies governing agencies with the software and hardware to integrate streaming media into their communications tool set. The Granicus Open Platform API enables developers to connect their...

The U.S. Department of Labor is implementing an API project to make it easier for developers to access and use the data collected by the department and to increase public participation in government...

The Office of the Federal Register informs citizens of their rights and obligations, documents the actions of Federal agencies, and provides a forum for public participation in the democratic process...

The Virtual Solar Observatory (VSO) combines access to observations of the Sun, including images. Data files are included from all NASA solar-observing missions, as well as ground-based observatories...

Recovery.gov gives transparency to the funds made available by the American Recovery and Reinvestment Act of 2009. The website allows taxpayers to track how and where Recovery funds are spent as well...